I think variations on this strategy have been posted but I have found this to work real well on Emperor. Basically, I rush Writing and after building my initial 2 scouts (I play a ton as Spain) and my Monument, I typically start in on the Great Library.
Policies: Tradition opener, liberty opener, liberty (Free worker), Aristocracy (+15% wonders). Free worker should drop roughly on cue with the start of the GL. I almost always have an early cultural CS ally with the Spanish wonder cash. If you got lucky and found 2 natural wonders or the holy grail, the Great Barrier Reef, you can get two early cultural CS allies.
Techs: Pottery/Writing/Animal Husbandry/Philosophy/Trapping. If you time it right, you can be almost exactly finished with Trapping the same time as the GL hits.
At this point, the bigger deal is not the free library or free 30+ turn tech (Civil Service), it is slingshotting to the Medieval era, where your cultural CS bonuses become huge for that stage of the game, and Patronage opens up. You can absolutely cruise Patronage at that stage with +24 culture (plus your own) at your back. It is possible to be through almost all of it by 0 AD. Makes the +2 culture of France seem weak.
You can also add another CS ally or two through some exploration at this point. Get sailing next and the Trireme out there and find that reef! 1000 gold in BC times is such a monster.
Note: This also works with Theology as well. One could then build the Hagia Sophia and use the GE to build Chichen Itza.
Policies: Tradition opener, liberty opener, liberty (Free worker), Aristocracy (+15% wonders). Free worker should drop roughly on cue with the start of the GL. I almost always have an early cultural CS ally with the Spanish wonder cash. If you got lucky and found 2 natural wonders or the holy grail, the Great Barrier Reef, you can get two early cultural CS allies.
Techs: Pottery/Writing/Animal Husbandry/Philosophy/Trapping. If you time it right, you can be almost exactly finished with Trapping the same time as the GL hits.
At this point, the bigger deal is not the free library or free 30+ turn tech (Civil Service), it is slingshotting to the Medieval era, where your cultural CS bonuses become huge for that stage of the game, and Patronage opens up. You can absolutely cruise Patronage at that stage with +24 culture (plus your own) at your back. It is possible to be through almost all of it by 0 AD. Makes the +2 culture of France seem weak.
You can also add another CS ally or two through some exploration at this point. Get sailing next and the Trireme out there and find that reef! 1000 gold in BC times is such a monster.
Note: This also works with Theology as well. One could then build the Hagia Sophia and use the GE to build Chichen Itza.